Other thoughts:
Mounting one of those on a side panel is going to be a PITA, bordering feasibly impossible. If you put your GPU in a bottom(ish) slot, you might be able to reach the front 120mm fan (Tell me if I'm wrong).

Good luck

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I've thought for a while how I was going to put 2 rads in the system and I think side panel is best option but not utilizing the existing 120mm fan slot is the best way to go. We will have to see when the time comes to actually put everything together.

If I can't I've also thought about putting the video card rad against the front panel assuming space allows.

I'm really hoping that I don't have to make too much modification since I intend it to be a simple box more than anything else.